Prac musc

Question 1

Abductor pollicis longus
(APL)

Answer 1

O: Posterior surface of proximal halves of ulna, radius, and interosseous membrane
I: Base of 1st metacarpal
N: posterior interosseous ( continuation of deep branch of radial n)

Question 2

which pulse can be palpated in the anatomical snuff box

Answer 2

radial a.

Question 3

what is found in the superficial fascia over the anatomical snuff box

Answer 3

superficial branch of the radial nerve and veins tributaries of the cephalic vein

Question 4

what is the function of synovial sheaths

Answer 4

to reduce friction between the extensor tendons and bones

Question 5

wrist joint

Answer 5

• synovial condyloid
• distal radius articulates with the scaphoid and lunate carpal bones, while ulna does not contribute to the wrist joint and it has articular disc separating it from the carpal bones
• flexion extension, abduction adduction

Question 6

what muscles are innervated by the deep branch of radial nerve

Answer 6

• extensor carpi radialis brevis
• extensor carpi ulnaris
• extensor digitorum
• extensor digiti minimi
• supinator

Question 7

what nerve innervates pronator quadrates

Answer 7

anterior interosseous n from median n

Question 8

what n innervates anconeus

Answer 8

radial n

Question 9

anconeus

Answer 9

O: Lateral epicondyle of humerus
I: Lateral surace o olecra- non and superior part o posterior surace o ulna
M: Assists triceps in extending forearm; stabilizes elbow joint; may abduct ulna during pronation

Question 10

what nerve innervates Flexor pollicis longus (FPL)

Answer 10

Anterior interos- seous nerve, rom median nerve

Question 11

Posterior interosseous nerve (C7, C8), continu- ation o deep branch of radial nerve

Answer 11

• Abductor pollicis longus (APL)
• Extensor pollicis longus (EPL)
• Extensor pollicis brevis (EPB)

Question 12

what muscle attaches to the radial tuberosity?

Answer 12

biceps brachii muscle

Question 13

what attaches to supraglenoid tubercle

Answer 13

long head of biceps brachia

Question 14

what muscle originates at spine of scapula

Answer 14

deltoid

Question 15

what muscle inserts on the spine

Answer 15

trapezius

Question 16

coronoid fossa

Answer 16

accommodates coronoid process of ula during flexion of elbow

Question 17

what does capitulum articulate w

Answer 17

head of radius

Question 18

what does the trochlea articulate w

Answer 18

the trochlear notch

Question 19

ant & medial surface of ulna

Answer 19

origin site for F.D.P

Question 20

posterior surface of ulna

Answer 20

origin for
- E.I
- E.E.P.L
- A.P.L

instertion for
- anconeus

Question 21

dorsal tubercle

Answer 21

attachment
- extensor retinaculum
- dorsal radiocarpal ligament

Question 22

lateral supracondylar ridge

Answer 22

• brachioradialis
• extensor carpi radialis longus

Question 23

medial supraepicondylar ridge

Answer 23

pronator teres

Question 24

F.D.s

Answer 24

O: medial epicondyle of humerus, coronoid process of ulna and anterior border of radius.
I middle phalanges of the medial 4 digits.
flexion of the middle phalanges at proximal interphalangeal joints, flexion of proximal phalanges at metacarpophalangeal joints.

Question 25

FLEXOR POLL LONG

Answer 25

Flexor pollicis longus, originates from the anterior surface of the radius and interosseous membrane, it inserts into base of distal phalanx of thumb (pollex). Flexes phalanges of thum

Question 26

FLEXOR DIG PROFUNDUS

Answer 26

originates from the proximal anterior surface of the ulna. Inserts on base of distal phalanges of medial four digits.

Question 27

Flexes distal phalanges at distal interphalangeal joints, metacarpophalangeal joints and assists in flexion of hand.